<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <div class="nav-left"  @mouseenter="isShowNav = true" @mouseleave="handlerIsShowNav">
        <h2 class="all" >全部商品分类</h2>
        <Transition enter-active-class="animate__fadeIn" leave-active-class="animate__fadeOut">
          <div class="sort animate__animated "  v-show="isShowNav">
            <div @click="toSearch" class="all-sort-list2">
              <!-- 一级菜单 -->
              <div class="item" v-for="c1 in categoryList" :key="c1.categoryId">
                <h3>
                  <a data-leave="1" :data-id="c1.categoryId">{{ c1.categoryName }}</a>
                </h3>
                <div class="item-list clearfix">
                  <!-- 二级菜单 -->
                  <div
                    class="subitem"
                    v-for="c2 in c1.categoryChild"
                    :key="c2.categoryId"
                  >
                    <dl class="fore">
                      <dt>
                        <a data-leave="2" :data-id="c2.categoryId">{{ c2.categoryName }}</a>
                      </dt>
                      <dd>
                        <!-- 三级菜单 -->
                        <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                          <a data-leave="3" :data-id="c3.categoryId">{{ c3.categoryName }}</a>
                        </em>
                        <!-- 三级菜单 -->
                      </dd>
                    </dl>
                  </div>
                  <!-- 二级菜单 -->
                </div>
              </div>
              <!-- 一级菜单 -->
            </div>
          </div>
      </Transition>
      </div>
      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
    </div>
  </div>
</template>

<script>
// 获取store 中的所有state 数据，然后将其映射为当前组件的computed。
import { mapState } from "vuex";
import 'animate.css';
export default {
  name: "Typenav",
  data(){
    return {
        isShowNav:this.$route.path === "/"
    }
  },
  computed: {
    ...mapState("home", ["categoryList"]),
  },
  methods:{
    toSearch(e){
      // 通过事件源获取事件委派的子标签传递的数据 dataset
      let {id,leave} = e.target.dataset
      // 获取标签体数据
      let categoryName = e.target.innerHTML
      let {keyword} = this.$route.query
      // 判断leave 是不是空  是空不进行跳转  解决点击空跳转bug
      if(leave){
        this.$router.push({
        path:"/search",
        query:{
          [`category${leave}Id`]:id,
          categoryName,
          keyword
        }
      })
      }
      
    },
    handlerIsShowNav(){
      this.$route.path !== "/" ? this.isShowNav=false : null
    }
  },
  mounted() {
    // 通过找组件对象身上的
    this.$store.dispatch("home/GetCategoryList");
  },
};
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;
      animation-duration: .5s;
      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;
            &:hover {
              background: #E1251B;
              a{
                color: white;
              }
            }
            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                  a:hover{
                    color: #E1251B;
                  }
                }

                dd {
                  float: left;
                  width: 580px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                    a:hover{
                      color: #E1251B;
                    }
                  }
                }
              }
            }
          }

          &:hover {
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
</style>